Clock



FIG. 1 is a front elevational view of a clock showing our new design;

FIG. 2 is a left side elevational view thereof, the right side being amirror image thereto;

FIG. 3 is a top plan view thereof, the bottom plan being a mirror imagethereto;

FIG. 4 is a rear elevational view thereof on a reduced scale.

The ornamental design for a clock, as shown and described.